Wheel rim retainer

ABSTRACT

A wheel rim retainer includes an annular unit, a first end connecting member movably coupled at one end of the annular unit, and a second end connecting member movably coupled at an opposed end of the annular unit. The annular unit includes a plurality of hinged members movably coupled with each other in an edge-to-edge manner, wherein each of the hinged members has a width larger than a width of the wheel well. The second end connecting member is detachably coupled with the first end connecting member for encircling the hinged members around a hub surface of a wheel rim to cover a wheel well thereof so as to prevent a bead of a tire falling at the wheel rim when the tire is deflated.

NOTICE OF COPYRIGHT

A portion of the disclosure of this patent document contains materialwhich is subject to copyright protection. The copyright owner has noobjection to any reproduction by anyone of the patent disclosure, as itappears in the United States Patent and Trademark Office patent files orrecords, but otherwise reserves all copyright rights whatsoever.

BACKGROUND OF THE PRESENT INVENTION

Field of Invention

The present invention relates to a vehicle wheel rim, and moreparticularly to a wheel rim retainer which comprises a plurality ofhinged-members fastened around the vehicle wheel rim for use as arun-flat assembly and/or a bead-lock assembly.

Description of Related Arts

Pneumatic tires are commonly mounted on a wheel rim A10 at a positionthat two beads of the tire are mounted at two bead flanges of the wheelrim A10, as shown in FIG. 8. An annular wheel well A11 is generallyformed on a circumferential hub surface of the wheel rim A10 between thetwo bead flanges therebetween. The wheel well A11 allows the tire to beeasily installed into or remove from wheel rim A10 by placing one of thebeads of the tire at the wheel bead to hold the tire in position.

When the tire pressure of the vehicle is lower than the standard tirepressure, or the tire of the vehicle is punctured by a sharp object(such as nail, etc.), the pressure of the tire of the vehicle isgradually decreased especially during driving. In other words, thefriction between the tire and the ground is multiply increased.Therefore, the temperature of the tire will be dramatically increasedthat the tire will become softer and the strength thereof will bedramatically decreased as well. In such situation, the occurrence ratesof flat tires for the vehicle will dramatically increase especially whendriving at high speed. For example, when the tire pressure isdramatically dropped due to a blowout or puncture during running, thedriver will loss the control of the vehicle easily. As a result,collision of vehicles may occur. Seriously, the vehicle may be flippedover due to the flat tire. Especially when the bead of the flat tirefalls into the wheel well A11 of the vehicle rim, the bead flange of thevehicle rim will be exposed to run on the road surface, as shown in FIG.9. Vehicle explosion may occur due to the sparks generated by thefriction between the bead flange of the vehicle rim and the roadsurface.

An annular fastener is provided in the current market to fasten aroundthe hub surface of the wheel rim A10 for supporting the beads inposition. Generally speaking, the annular fastener comprises a C-shapedelastic band having a C-shape two free ends, and a screw fastenerfastening the free ends of the elastic band in order to encircle theelastic band around the hub surface of the wheel rim A10 for coveringthe wheel well A11. An improved annular fastener may include two elasticbands and two screw fasteners fastening the elastic bands end-to-end toachieve the same function. The elastic band is usually made of plasticor metal to increase the elasticity properties so that the elastic bandcan be bent to overlap on the hub surface. However, it is difficult tomount the elastic band around the hub surface of the wheel rim A10because the operator must apply relatively strong pulling force to pulltwo free ends of the elastic band together and to overcome the elasticforce thereof. Once the elastic band is installed, the screw fastenerwill be eventually loosened by the elastic force of the elastic bandand/or the rotational movement of the wheel rim A10. When the elasticband is loosen, the wheel well A11 cannot be covered by the elasticband. More importantly, the inner surface of the tire may be cut by theelastic band, which may damage the tire.

Accordingly, different sizes of wheel rim A10 may have different sizesof wheel well A11. The circumference of the elastic band must match withthe width of the wheel well A11. In addition, in order to retain theelastic band in position, a plurality of wedges are provided along theelastic band, wherein the wedges are seated at the wheel well A11 andare supposed to prevent any lateral movement of the elastic band on thehub surface of the wheel rim A10. However, if the elastic band is madeof relative rigid material to support the beads of the tire, theinstallation of the elastic band will be difficult to band in curveconfiguration and to match with the hub surface. If the elastic band ismade of relative soft material for easy installation, the elastic bandmay not be strong enough to support the beads of the tire. Furthermore,the wedges cannot be securely engaged within the wheel well A11, via anyengagement structure, that the lateral movement of the elastic band willcause the misalignment of the annular fastener around the hub surface ofthe wheel rim A10. Therefore, the annular fastener cannot ensure thebasic supporting function due to a blowout and may also seriously damagethe tire.

SUMMARY OF THE PRESENT INVENTION

A main object of the present invention is to provide a wheel rimretainer for use as a run-flat assembly and/or a bead-lock assembly,wherein the wheel rim retainer comprises:

an annular unit which comprises a plurality of hinged members movablycoupled with each other in an edge-to-edge manner, such that the hingedmembers can be moved correspondingly with each other to fittinglyoverlap around a wheel well of a wheel rim;

a first end connecting member movably coupled at one end of the annularunit;

a second end connecting member having a first end movably coupled at anopposed end of the annular unit and a second end detachably coupled withthe first end connecting member; and

a plurality of well retainers spacedly and radially extended from aninner surface of the annular unit, wherein the well retainers areprotruded from inner surfaces of the hinged members.

When the first and second end connecting members are detachably coupledwith each other, the hinged members of the annular unit are moved in acircular configuration for encircling around a hub surface of the wheelrim at a position that the well retainers are engaged with the wheelwell of the wheel rim. In particular, the annular unit will form thecircular configuration to cover the wheel well of the wheel rim.

Another object of the present invention is to provide a wheel rimretainer, wherein the well retainers are engaged with the wheel well ofthe wheel rim to support the hinged members when the tire is blown out.

Accordingly, the wheel rim retainer further comprises a plurality oftire engaging elements spacedly provided on an outer surface of theannular unit. In particular, the tire engaging elements are spacedlyprotruded on the outer surfaces of the hinged members. The tire engagingelements are engaged with the inner surface of the flat tire so as toprevent the tire being free-rotated around the wheel rim when the tireis deflated, especially during braking operation of the vehicle.

Another object of the present invention is to provide a wheel rimretainer, wherein the well retainers are securely and frictionallyengaged with the bottom wall of the wheel well. In particular, each ofthe well retainers comprises a well supporter protruded from the innersurface of the hinged member and a well engager coupled at the wellsupporter to bias against the wheel well of the wheel rim.

Furthermore, each of the well retainers further comprises a frictionalelement formed at a bottom side of the well engager for frictionallyengaging with the bottom wall of the wheel well of the wheel rim.

It is worth mentioning that each of the frictional elements has aplurality of frictional treads for engaging with the bottom wall of thewheel well of the wheel rim.

Alternatively, each of the frictional elements provides a plurality offrictionally contacting points for frictionally contacting with thebottom wall of the wheel well of the wheel rim.

Accordingly, the wheel rim retainer further comprises an electronicdevice or a monitoring device, such as a signal emitting device, whichis provided on at least one of the hinged members.

Preferably, the width of each of the hinged members is larger than orequal to a width of a bottom wall of the wheel well to ensure the wheelwell to be covered by the hinged members. In addition, the overallthickness of the wheel rim retainer, i.e. the thickness of the hingedmember and the height of the well retainer, is smaller than a distancebetween the bottom wall of the wheel rim and the top edge of the beadflange of the wheel rim.

Preferably, the two adjacent hinged members are movably connected witheach other by the pivot shaft.

Preferably, the first end connecting member and the corresponding hingedmember are movably connected with each other by the pivot shaft, and thesecond end connecting member and the hinged member are movably connectedwith each other by the pivot shaft. The first end connecting member andthe second end connecting member are detachably connected with eachother by a fastener, such as a bolt and nut connection.

The present invention provides the following advantages:

1. The structure of the present invention is rational, wherein thehinged members, the first end connecting member, and the second endconnecting member can be made of rigid materials, so the presentinvention can provide a better supporting effect due to tire blowout,and further improve the driving safety, so as to minimize the riskcoefficient of the tire. In other words, since the wheel well of thewheel rim is covered by the annular unit, the present invention canprevent the bead of the flat tire being fallen at the wheel well and thebead flange of the vehicle rim being exposed to run on the road surface.

2. The present invention provides the best engagement between with thebottom side of the wheel well and the well retainers after installation,so as to ensure the control the wheel rim by the driver, such asoperating the braking system of the vehicle. In addition, the wheel rimretainer will prevent the free-rotation of the tire, via the tireengaging elements of the present invention, with respect to the wheelrim after the tire is blown out.

3. The frictional engagement between the bottom side of the wheel welland the well retainers will prevent the wheel rim retainer beingfree-rotated with respect to the wheel rim. In other words, thefrictional engagement of the wheel rim retainer will ensure the wheelrim retainer to be rotated with the wheel rim concurrently.

4. The present invention is easy to be disassembled and assembledthrough the movable engagement of the hinged member. Especially duringtransportation and storage, the present invention can be disassembled,so the volume of the present invention is reduced to facilitate thetransportation.

5. The electronic device or a monitoring device, such as a signalemitting device, at the hinged member is able to monitor and control thecondition and proper connection of the wheel rim retainer, as well asthe status of the tire, such as tire pressure.

Additional advantages and features of the invention will become apparentfrom the description which follows, and may be realized by means of theinstrumentalities and combinations particular point out in the appendedclaims.

Still further objects and advantages will become apparent from aconsideration of the ensuing description and drawings.

These and other objectives, features, and advantages of the presentinvention will become apparent from the following detailed description,the accompanying drawings, and the appended claims.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a perspective view a wheel rim retainer according to apreferred embodiment of the present invention.

FIG. 2 is a perspective view of a hinged-member of the wheel rimretainer according to the above preferred embodiment of the presentinvention.

FIG. 3 is an exploded bottom view of the hinged-member of the wheel rimretainer according to the above preferred embodiment of the presentinvention.

FIG. 4 is a perspective top view of a first end connecting member of thewheel rim retainer according to the above preferred embodiment of thepresent invention.

FIG. 5 is a perspective view of a second end connecting member of thewheel rim retainer according to the above preferred embodiment of thepresent invention.

FIG. 6 is a sectional view of the wheel rim retainer installed into thewheel rim according to the above preferred embodiment of the presentinvention.

FIGS. 7A to 7C illustrate the wheel rim retainer for differentconfigurations of the wheel well according to the above preferredembodiment of the present invention.

FIG. 8 illustrates a prior art showing the tire mounted to the wheelrim.

FIG. 9 illustrates a prior art showing the bead of the tire falling atthe wheel well of the wheel rim when the tire is deflated.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

The following description is disclosed to enable any person skilled inthe art to make and use the present invention. Preferred embodiments areprovided in the following description only as examples and modificationswill be apparent to those skilled in the art. The general principlesdefined in the following description would be applied to otherembodiments, alternatives, modifications, equivalents, and applicationswithout departing from the spirit and scope of the present invention.

Referring to FIG. 1 to FIG. 6 of the drawings, a wheel rim retainer foruse as a run-flat assembly and/or a bead-lock assembly according to apreferred embodiment of the present invention is illustrated, whereinthe wheel rim retainer comprises an annular unit which comprises aplurality of hinged members 1 movably coupled with each otheredge-to-edge, a first end connecting member 2 movably coupled at one endof the annular unit, and a second end connecting member 3 movablycoupled at an opposed end of the annular unit. Accordingly, the hingedmembers 1 are detachably coupled with each other while the first andsecond end connecting members 2, 3 are detachably coupled at two ends ofthe annular unit.

The wheel rim retainer further comprises a plurality of well retainers 4spacedly protruded from inner sides of the hinged members 1 and radiallyextended toward a center of the annular unit. Preferably, the wellretainers 4 are also formed at the inner sides of the first and secondconnecting members 2, 3. Accordingly, the well retainers 4 are alignedwith each other to engage with the wheel well A11 of the wheel rim A10.

According to the preferred embodiment, the first and second connectingmembers 2, 3 are detachably coupled with each other to form an annularconfiguration of the annular unit to fasten to a wheel rim A10, whereinthe hinged members 1 are overlapped on a hub surface of the wheel rimA10 at a position that the well retainers 4 are engaged with a wheelwell A11 indented on the hub surface and between two bead flanges A12 ofthe wheel rim A10.

Accordingly, the first and second connecting members 2, 3 are detachablycoupled via a fastener 7, such as bolt, rivet or other connectionmembers. Two adjacent hinged members 1 are hinged by a pivot shaft 6 topivotally connect the hinged members 1 with each other edge-to-edge,preferably the transverse edges of the hinged members 1 are pivotallycoupled with each other, such that the hinged members 1 are able topivotally move with each other for matching the circumferentialcurvature of the hub surface of the wheel rim A10. Due to the detachablefeature of the hinged members 1, the number of hinged members 1 can beselectively adjusted to match with the circumferential size of the hubsurface of the wheel rim A10. In other words, for a bigger size of thewheel rim A10, the length of the annular unit can be prolonged by addinga predetermined number of hinged members 1 until the length of theannular unit matches with the circumferential size of the hub surface ofthe wheel rim A10. It is worth mentioning that the first and secondconnecting members 2, 3 are detachably coupled with the hinged members 1via the pivot shafts 6 respectively. In addition, when increasingnumbers of the hinged members 1, the numbers of well retainers 4 will beincreased. Preferably, there are two well retainers 4 spacedly formed ateach hinged member 1.

For storage and handling purpose, the hinged members 1, the first endconnecting member 2, and the second end connecting member 3, can bedetached with each other, such that the wheel rim retainer of thepresent invention can be disassembled to substantially reduce the volumethereof. Depending the circumferential size of the wheel rim A10, theuser is able to assemble the hinged members 1, the first end connectingmember 2, and the second end connecting member 3 via the pivot shafts 6to install into the wheel rim A10. It is worth mentioning that a widthof each of the hinged members 1 is configured corresponding to a widthof the wheel well A11 in order to cover the wheel well A11, such thatthe beads of the tire are retained normally at bead flange A12 of thewheel rim A10 as the conventional structure while the well retainers 4are engaged with a bottom side of the wheel well A11. In other words,the beads of the tire will be retained and blocked by the longitudinaledges of the hinged members 1, as shown in FIG. 6, to prevent the beadof the tire to be fallen at the wheel well A11. In case of tire blowoutduring driving, the beads of the tire are held in the installed positionto prevent one of the beads of the tire falling at the wheel well A11 ofthe wheel rim A10. Since the hinged members 1 are pivotally moved witheach other, no elastic force is generated when the hinged members 1 areoverlapped on the hub surface of the wheel rim A10. As a result, thehinged members 1 are selectively moved to form a polygonal configurationto match with the curvature of the hub surface of the wheel rim A10 toensure the surface alignment between the hinged members 1 and the hubsurface of wheel rim A10. It is worth mentioning that the angle betweenthe hinged members 1 can be selectively adjusted to ensure theengagement between the well retainers 4 and the wheel well A11 of thewheel rim A10. As a result, in case of tire blowout, the presentinvention ensures the tire to be encircled around the wheel rim A10 tocover the bead flanges A12 thereof so as to provide a driving safetyfeature of the wheel rim A10.

According to the preferred embodiment, the wheel rim retainer furthercomprises a plurality of tire engaging elements 5 spacedly formed on anouter surface of each of the hinged members 1, wherein the tire engagingelements 5 are elongated elements integrally and transversely protrudedfrom the outer surfaces of the hinged members 1. In case of tireblowout, the deflated tire will be collapsed on the hinged members 1. Asa result, the tire engaging elements 5 will engage with the innersurface of the tire to ensure the tire to be encircled around the wheelrim A10 to cover the bead flanges A12 thereof. Preferably, the tireengaging elements 5 are also formed at the inner sides of the first andsecond connecting members 2, 3.

According to the existing problem of the wheel rim A10 and the tire,when the tire is blown out, the flat tires will free to rotate withrespect to the wheel rim A10. Even though the speed of the vehicle isreduced, the free rotation of the tire will cause the vehicle to skid inan uncontrolled manner. Therefore, the tire engaging elements 5 cansolve the above mentioned problem by engaging the tire engaging elements5 with the inner surface of the flat tire so as to prevent the tirebeing free-rotated around the wheel rim A10. It is worth mentioning thatthe number of the hinged members 1 is adjustable depending on the sizeof the wheel rim A10, the number of the tire engaging elements 5 issufficiently provided with respect to the number of the hinged members 1to match with the size of the tire. Preferably, at least one tireengaging element 5, preferably two tire engaging elements 5, is arrangedon each hinged member 1 while being cost effective, in such a mannerthat the tire will be held by one or more tire engaging elements 5 toprovide the lowest manufacturing cost with the highest tire holdingefficiency.

As shown in FIG. 3, each of the well retainers 4 comprises a wellsupporter 41 protruded from the inner surface of the hinged member 1 anda well engager 42 coupled at the well supporter 41 to bias against thebottom wall of the wheel well A11 of the wheel rim A10. Preferably, thewell supporter 41 is integrally protruded from the inner surface of thehinged member 1 and the well engager 42 is detachably coupled at thewell supporter 41. Therefore, different sizes of well engagers 42 can beselectively replaced to match with the size of the wheel well A11 of thewheel rim A10.

Accordingly, each of the well retainers 4 further comprises a frictionalelement 43 formed at a bottom portion of the well engager 42 forfrictionally engaging with the bottom wall of the wheel well A11 of thewheel rim A10, as shown in FIG. 6. Preferably, the frictional element 43is integrally formed with the well engager 42.

Preferably, each of the frictional elements 43 has a plurality offrictional treads formed at the bottom side of the well engager 42 forfrictionally engaging with the bottom wall of the wheel well A11 of thewheel rim A10.

Alternatively, each of the frictional elements 43 provides a pluralityof frictionally contacting points formed at the bottom side of the wellengager 42 for frictionally contacting with the bottom wall of the wheelwell A11 of the wheel rim A10.

According to the preferred embodiment, each of the well retainers 4 hasa quadrilateral cross section, preferably trapezoidal cross section,wherein at least one well retainer 4 is formed at each hinged member 1.When the hinged members 1 are folded to form an annular configuration,the well retainers 4 are aligned to radially point toward a center ofthe annular configuration of the annular unit, such that the hingedmembers 1 are overlappedly encircled with the hub surface of the wheelrim A10 to engage the well retainers 4 at the wheel well A11 of thewheel rim A10. Accordingly, the conventional well support is entirelymade of frictional material to contact with the well surface of thewheel well A11 because the size and shape of the conventional wellsupport are fixed and unchangeable. As a result, the conventional wellsupport will not perfectly fit for different sizes and shapes of thewheel rims A10 that the contact between the conventional well supportand the wheel well A11 will be minimized. The cost of the conventionalwell support will be increased by increasing the use of the frictionalmaterial. In other words, the conventional well support cannot engagewith the bottom side of the wheel well A11. In view of the presentinvention, the well supporter 41 is integrally provided at the innersurface of each of the hinged members 1, wherein the well engager 42with the corresponding size and shape can be replaceably coupled withthe well supporter 41. It is worth mentioning that each of the wellengager 42 has a coupling slot that the well supporter 41 is insertedinto the coupling slot of the well engager 42 in order to detachablycouple the well engager 42 with the well supporter 41. Furthermore, thefrictional element 43 is provided at the bottom portion of the wellengager 42 to engage with the bottom wall of the wheel well A11, suchthat the material used for the well retainer 4 to frictional engage withthe wheel well A11 will be substantially reduced, so as to minimize thecost of the well retainer 4. Preferably, two well supporters 41 areprovided at each of the hinged members 1, such that two well engagers 42are detachably coupled with the well supporters 41 respectively at eachof the hinged members 1. As a result, each of the hinged members 41 issupported above the wheel well A11 in a balanced manner to retain thebeads of the tire in position. In addition, since the frictionalelements 43 are frictionally engaged with the bottom wall of the wheelwell A11, the hinged members 1 are unable to free-rotate with respect tothe wheel rim A10. In case of tire blowout, the frictional engagementbetween the well retainers 4 and the wheel well A11 will prevent thehinged members 1 being free-rotated around the wheel rim A10, so as toensure the speed of the vehicle to be properly reduced via the brakingsystem of the vehicle. It is worth mentioning that each of thefrictional elements 43 has a plurality of frictional treads for engagingwith the bottom wall of the wheel well A11 of the wheel rim A10, asshown in FIG. 3. Alternatively, each of the frictional elements 43provides a plurality of frictionally contacting points for frictionallycontacting with the bottom wall of the wheel well A11 of the wheel rimA10, as shown in FIG. 1.

Accordingly, the wheel rim retainer further comprises an electronicdevice or a monitoring device which is provided on at least one of thehinged members 1.

In particular, the electronic device or the monitoring device can beinstalled at one of the hinged members 1. Accordingly, two or moreelectronic devices or the monitoring devices can be installed intodifferent hinged members 1 respectively for monitoring the hinge members1, the first and second end connecting members 2, 3, and/or the wellretainers 4, so as to ensure the proper operation of each of the hingemembers 1, the first and second end connecting members 2, 3, and/or thewell retainers 4. The proper operation of the present invention willensure the flat tire to be supported by the wheel rim retainer duringaccident.

It is appreciated that a tire pressure monitoring device can also beinstalled into at least one of the hinged members 1 for monitoring thetire pressure of the tire, so as to ensure the corrected tire pressurethereof.

Preferably, the width of each of the hinged members 1 is larger than awidth of the bottom wall of the wheel well A11 to ensure the wheel wellA11 to be covered by the hinged members 1. In addition, the overallthickness of the wheel rim retainer, i.e. the thickness of the hingedmember 1 and the height of the well retainer 4, is smaller than adistance between the bottom wall of the wheel rim A10 and the top edgeof the bead flange of the wheel rim A10. Preferably, a height of each ofthe well retainer 4 is larger than a depth of the wheel well A11.

In other words, the configurations of the present invention, i.e. (i)the width of each of the hinged members 1 being larger than or equal tothe width of the bottom wall of the wheel well A11, and (ii) the overallthickness of the wheel rim retainer being smaller than a distancebetween the bottom wall of the wheel rim A10 and the top edge of thebead flange of the wheel rim A10, will ensure there is no offset betweenthe wheel rim retainer and the wheel rim A10 when the tire is blown out.Therefore, after the installation of the wheel rim retainer, the hingedmembers 1 will be located above and coupled with the wheel well A11 aswell as cover the wheel well A11 so as to prevent the bead falling atthe wheel well A11 when the tire is deflated. In addition, the width ofthe hinged member 1 is large enough to prevent the hinged member 1falling at the wheel well A11 of the wheel rim A10 when the tire isdeflated, so as to maintain the supporting function of the wheel rimretainer.

As shown in FIG. 6, the width of the hinged member 1 matches with anopening width of the wheel well A11. Accordingly, the wheel well A11 hasa uniform depth. When the wheel rim retainer of the present invention isdisposed at the wheel well A11, the overall thickness of the wheel rimretainer, i.e. the thickness of the hinged member 1 and the height ofthe well retainer 4, is slightly larger than the depth of the wheel wellA11. Therefore, the hinged members 1 will be supported above the openingof the wheel well A11 to cover the wheel well A11.

According to the preferred embodiment, the wheel rim retainer of thepresent invention can fit to different configurations of the wheel wellA11 as shown in FIGS. 7A to 7C. In particular, the overall thickness ofthe wheel rim retainer, i.e. the thickness of the hinged member 1 andthe height of the well retainer 4, is larger than or equal to the depthof the wheel well A11, i.e. the distance between the bottom wall of thewheel well A11 and the hub surface of the wheel rim A10, in order toensure the wheel well A11 to be covered by the hinged members 1.

FIG. 7A illustrates a first alternative configuration of the wheel rimretainer, wherein the wheel well A11 has a uniform depth. When the wheelrim retainer of the present invention is disposed at the wheel well A11,the overall thickness of the wheel rim retainer, i.e. the thickness ofthe hinged member 1 and the height of the well retainer 4, matches withthe depth of the wheel well A11. Therefore, the hinged members 1 will besupported at the opening of the wheel well A11 to align with the hubsurface of the wheel rim A10 and to cover the wheel well A11.

FIG. 7B illustrates a second alternative configuration of the wheel rimretainer, wherein the wheel well A11 has a steeper portion at one sideand a shallow portion at an opposed side. When the wheel rim retainer ofthe present invention is disposed at the wheel well A11, the wellretainer 4 is frictionally engaged with the bottom wall of the wheelwell A11 at the steeper portion thereof. The width of the hinged member1 is prolonged and extended to cover the shallow portion of the wheelwell A11. Therefore, the hinged members 1 will be supported at theopening of the wheel well A11 to cover the wheel well A11.

FIG. 7C illustrates a third alternative configuration of the wheel rimretainer, wherein the wheel well A11 has a steeper portion at one sideand a shallow portion at an opposed side to extend to the correspondingbead flange A12 of the wheel rim A10. When the wheel rim retainer of thepresent invention is disposed at the wheel well A11, the well retainer 4is frictionally engaged with the bottom wall of the wheel well A11 atthe steeper portion thereof. The width of the hinged member 1 isprolonged and extended to cover the shallow portion of the wheel wellA11. Therefore, the hinged members 1 will be supported to align with thehub surface of the wheel rim A10 at the steeper portion of the wheelwell A11 and to cover the wheel well A11.

Preferably, the two adjacent hinged members 1 are movably connected witheach other by the pivot shaft 6.

Preferably, the first end connecting member 2 and the correspondinghinged member 1 are movably connected with each other by the pivot shaft6, and the second end connecting member 3 and the hinged member 1 aremovably connected with each other by the pivot shaft 6, and the firstend connecting member 2 and the second end connecting member 3 aredetachably connected with each other by a fastener 7, such as a bolt andnut connection.

It is worth mentioning that the hinged members 1, the first endconnecting member 2, and the second end connecting member 3 can be madeof different materials to cover the wheel well A11. For example, one ofthe hinged members 1, the first end connecting member 2, and the secondend connecting member 3 can be made metal, plastic, or rubber withembedded metal wire.

One skilled in the art will understand that the embodiment of thepresent invention as shown in the drawings and described above isexemplary only and not intended to be limiting.

It will thus be seen that the objects of the present invention have beenfully and effectively accomplished. The embodiments have been shown anddescribed for the purposes of illustrating the functional and structuralprinciples of the present invention and is subject to change withoutdeparture from such principles. Therefore, this invention includes allmodifications encompassed within the spirit and scope of the followingclaims.

What is claimed is:
 1. A wheel rim retainer for a wheel rim having awheel well indented on a hub surface and two bead flanges to engage withbeads of a tire after inflated, wherein the wheel rim retainercomprises: an annular unit which comprises a plurality of hinged membersmovably coupled with each other in an edge-to-edge manner, wherein eachof said hinged members has a width larger than a width of the wheelwell; a first end connecting member movably coupled at one end of saidannular unit; a second end connecting member movably coupled at anopposed end of said annular unit, wherein said second end connectingmember is detachably coupled with said first end connecting member forencircling said hinged members around the hub surface of the wheel rimto cover the wheel well thereof so as to prevent the bead of the tirefalling at the wheel rim when the tire is deflated; a plurality of wellretainers spacedly provided at an inner surface of said annular unit,wherein said well retainers are arranged for frictionally engaging withthe wheel well when said hinged members encircle the wheel rim, whereineach of said well retainers, which is integrally protruded from an innersurface of each of said hinged members, comprises a well supporterintegrally protruded from said inner surface of said hinged member and awell engager detachably coupled at said well supporter for matching witha size and shape of the wheel well, wherein each of said well retainersfurther comprises a frictional element integrally formed at a bottomportion of said well engager for frictionally engaging with a bottomwall of the wheel well.
 2. The wheel rim retainer, as recited in claim1, wherein each of said frictional elements has a plurality offrictional treads formed at a bottom side of said well engager forfrictionally engaging with the bottom wall of the wheel well of thewheel rim.
 3. The wheel rim retainer, as recited in claim 1, whereineach of said frictional elements has a plurality of frictionallycontacting points formed at a bottom side of said well engager forfrictionally contacting with the bottom wall of the wheel well of thewheel rim.